1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29c7358df44bdb280ef72dc34ecd3ad71548f89187dd5027570896f067f4730. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5dc7b7d5-893d-408d-ba5b-4a9cfa95cd3b.json and https://artists.proofprofile.net/proofs/artist/5dc7b7d5-893d-408d-ba5b-4a9cfa95cd3b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea58ae6f2f89d510b676d5d86a792ac1640f62c3bb89f4e6aea179702f69d5f6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWT2216617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf917b41e87ee6ba8dafb936257b2c50ba0e176ae5620192ad15783e74708ceca. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN62382976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581ad588fe0e8d61530aa94a4cfda003e438116b8107ea80e9cc7991454235e8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWY2236634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf7e5826ad867ab2feb070198c774e6d3c2f8c5432e0770df4689a584107bdb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWY2236647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a31330a36a1a37fa0cd7200efd707d6a477d9bb52ff1c9a120319b95eda798. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWY2236635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a92cad8df89357e6f6a50e836bc990ce0384e40632b7d4aa10482823d160b6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN62382982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11e40d8a4fc87c6089c5d77fced574275c8b0ee28ef98df022e26189316c638. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:06:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB82259103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce52982b4b08417f8c02c1b5e25b39d958cee7e2d9497161c7f16c1bd5822b3b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB82259147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0bba1c5808b107c419c87c643c92cc6de79897fd9213b17ce0f2d092c96de6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN62382985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49011941d82a1afd48fb2bc8a2eec45dd3beea807e61c2d65b2ac5f97f31ec2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB82259144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dba008badd5275c9a399e67634d705ead8d0e8967adb018fc0a43d9fe300f4b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN62382986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f5100ac7b31471f784f12ae3f8e1974a86535c87f987ff38298272b4aaae52. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN62382987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4f2fd12ad3121e366e40a4d42148a75c01887eeebd40b76af3cdfe5b994eb1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN62382988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112fd454c47447cdcb6bec8374687384cd6b05583d488a095df9821867175672. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:33:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN62382980.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe693f622228b476115f3777ad46902da5c253fcf39a824d218e2c49d717ed982. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN62382975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030fc850ae03c1b840e9ee8e3a15438bc4cd5e29ae2bc47e6537fa5cb8e0c756. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWY2236633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf15eac4f4ef8ff8e4267ad481fcacc3b8030f3093ffa8afd6207a0212572033. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB82259146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8348fbd4a97c6f6faede17f4536b97c8a1590dd96adf4df91b783e1e576099f7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAIH2462034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8415ab80193f17ae38db6616957cb7915597f7b68529614e471a962081072a5e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAIH2462069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc2048b581becd70264d094c32e0670dc950fcc1ecb2a8e32e853946e94e9ec. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAIH2462045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea71dca140766faa761325bfea65a06842269be4b71e435b54f3f6922297293. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAIH2461992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e02ffd3de6591e2ee5f877079fd142923108d41986c47a22138105e5df18c33. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAIH2462021.